Daughter with four fish to share (6)
I believe the answer is:
divide
'share' is the definition.
(thesaurus)
'daughter with four fish' is the wordplay.
'daughter' becomes 'd'.
'with' is a charade indicator (letters next to each other).
'four' becomes 'iv' (roman numeral).
'fish' becomes 'ide' (I've seen this before**).
'd'+'iv'+'ide'='DIVIDE'
'to' is the link.
(Other definitions for divide that I've seen before include "Separate, distribute" , "draw between 13A & 19" , "Partition. separate" , "Split into portions" , "Saying : '. . . . . . and conquer'" .)